//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

// UNSUPPORTED: c++03

// <vector>

// template <class... Args> iterator emplace(const_iterator pos, Args&&... args);

#include <vector>
#include <cassert>

#include "test_macros.h"
#include "min_allocator.h"
#include "asan_testing.h"

TEST_CONSTEXPR_CXX20 bool tests() {
  {
    std::vector<int> v;
    v.reserve(3);
    assert(is_contiguous_container_asan_correct(v));
    v = {1, 2, 3};
    v.emplace(v.begin(), v.back());
    assert(v[0] == 3);
    assert(is_contiguous_container_asan_correct(v));
  }
  {
    std::vector<int> v;
    v.reserve(4);
    assert(is_contiguous_container_asan_correct(v));
    v = {1, 2, 3};
    v.emplace(v.begin(), v.back());
    assert(v[0] == 3);
    assert(is_contiguous_container_asan_correct(v));
  }
  {
    std::vector<int, min_allocator<int>> v;
    v.reserve(3);
    assert(is_contiguous_container_asan_correct(v));
    v = {1, 2, 3};
    v.emplace(v.begin(), v.back());
    assert(v[0] == 3);
    assert(is_contiguous_container_asan_correct(v));
  }
  {
    std::vector<int, min_allocator<int>> v;
    v.reserve(4);
    assert(is_contiguous_container_asan_correct(v));
    v = {1, 2, 3};
    v.emplace(v.begin(), v.back());
    assert(v[0] == 3);
    assert(is_contiguous_container_asan_correct(v));
  }
  {
    std::vector<int, safe_allocator<int>> v;
    v.reserve(3);
    assert(is_contiguous_container_asan_correct(v));
    v = {1, 2, 3};
    v.emplace(v.begin(), v.back());
    assert(v[0] == 3);
    assert(is_contiguous_container_asan_correct(v));
  }
  {
    std::vector<int, safe_allocator<int>> v;
    v.reserve(4);
    assert(is_contiguous_container_asan_correct(v));
    v = {1, 2, 3};
    v.emplace(v.begin(), v.back());
    assert(v[0] == 3);
    assert(is_contiguous_container_asan_correct(v));
  }
  {
    std::vector<int> v;
    v.reserve(8);
    std::size_t old_capacity = v.capacity();
    assert(old_capacity >= 8);

    v.resize(4); // keep the existing capacity
    assert(v.capacity() == old_capacity);

    v.emplace(v.cend(), 42);
    assert(v.size() == 5);
    assert(v.capacity() == old_capacity);
    assert(v[4] == 42);
  }

  return true;
}

int main(int, char**) {
  tests();
#if TEST_STD_VER > 17
  static_assert(tests());
#endif
  return 0;
}
